Vacuum valve grinding tool



Aug. 4, 1931. v D. E. HICKS 1,8l7;688

VACUUM VALVE GRINDING .TOOL Filed June 15, 1929 atto'cmq Patented Aug. 4, 1931 DONALD E. HICKS, F LANSING, MICHIGAN enrNnI GmooL VACUUB'I VALVE Application filed June 15 materials that may or may not be employed.

The object of this. invention 1s to provide a gr1nd1ng tool of the nature stated which can be adjusted upon widely diiiering forms h of engine castings, or which maybe secured thereon by supports arranged independently of the engine parts. This invention comprises the special construction and arrangement of parts illustrated in the accompanying drawings, but does not as described and shown intentionally limit this applicant to exactly the forms set forth. The individual elements may obviously be varied in shape or size from those found in the drawings.

Of the drawings, Fig. 1 represents a sec,- tional view of the upper portion of an engine casting showing the valveand this invention arranged above the valve ready to be pressed down upon the valve. Fig. 2 is a top view of all parts assembled.

Throughout the drawings and description the same number is used to refer to the same part.

Considering the drawings, the upper portion of an engine castin 1 has the valve port 2 in which is seated a valve 3 intended to control the passage d to the cylinder of the engine. The casting 1 hasthe opening 5 above the valve from which there has been removed the cap carrying the spark plug and secured by bolts to the casting in the customary manner and which forms no part or" this invention.

This invention has the vertically extending and spaced legs 6 and 7 depending from the body of the support 8. On one side the support has a horizontal arm plate 9, and on the other side are two horizontal arm plates 10 and 11 at different heights 7 The support 8 carries a reciprocating and 1 29. Serial a. 371,178,

revoluble rod 12, and diametrically through the rod below the upper horizontal portion of the support 8- is a plate or in 13 secured to therod by a rivet 14. The fin 13 extends downwardly into the body of the vacuum cup 15, that is molded on the lower end of the rod 12 and-strongly adheres to the rod and to the fin 13, which permits the cupto be strongly raised, lowered or rotated without detachment of the cup. The rod 12 passes upwardly through a cylindrical head or guidingblock 16 formed on to-p of the support 8, and the rod terminates at the top ina circular head 17, between which head andlth-e support is arranged the coil spring 18, normally holding the cup in its uppermost position,1the.upward movement ofthe rod and cupbeinglimited by the contact of the fin 13 with the under side of the top of the support 8 as shown in Fig. 1. The circular head 17 is provided with spaced holes 19 and 20 to be engaged by the rotating instrument which is equipped with spaced pins to enter those holes, whatsoever its particular mechanism may be otherwise.

In Fig. 2 are shown the spaced bolt holes in the higher arm or plate 10, those holes being marked 21 and 22. It will be understood that the arm 11 below the arm 10 is provided with bolt holes such as those through the arm 10.

It will be observed 1n Fig. 2 that the single arm plate 9 on the left of the figure is wider than the other arm plates, and is pierced by the enlarged bolt holes 23, 24 and 25. The extension of those bolt holes permits a limited movement of the support when it is at tached to an engine casting or to some other body upon which it may be borne.

In the operation of this invention, it the casting has the openlng 5 as shown 1n Fig.

' 1 the Vertical legs 6 and 7 engage the wall of the opening and the support 8 is held against displacement in any direction. In some forms of engine castings threaded holes are so located that'machine screws may be passed through one or more of the holes in the arm plates and the support secured thereby. The arm plates 10 and 11 may be placed above and below the end of a bar independent of the casting, or they may engage portions of the casting if the construction thereof permits. Similarly the Wider arm plate 9 may be moved about until one or the other of its bolt holes coincides With a threaded hole in the casting and the support may be secured in place, the exact position being capable of limited variation by reason of the shapes of the bolt holes. By pressing the vacuum cup 15 down upon the valve a portion of the air is expelled from the cup and it Will grasp the top of the valve strongly. By the agency of the usual tool the holes 19 and 20 in head 17 are engaged and the cup and attached valve may be rotated until the valve is ground accurately in its seat.

Having now described this invention and explained the manner of its use, I claim In a valve grinder, a supporting member, in combination With a reciprocating and revoluble rod passing through the top of said member, a spring arranged to lift the rUol, a vacuum cup attached to the lower end of the rod, the said supporting member having oppositely arranged vertical legs and horizontal plates projecting from the said member, the said plates being provided With bolt holes, one of the said plates projecting from one side of the said member and a plurality of the said plates projecting from the other side of the said member in spaced relation.

In testimony whereof I afiiX my signature.

DONALD E. HICKS. 

